Therefore - Crossword Clue, Answer and Explanation

I've seen this clue in the Universal, the LA Times, the USA Today, The Mirror, the Penny Press, the King Feature Syndicate, the Newsday, the Sydney Morning Herald, The Star Tribune, The Wall Street Journal, The Times, The Telegraph, The Independent, the Evening Standard and The Guardian.

'therefore' is the definition.
(synonyms)

This is the entire clue.

(Other definitions for thus that I've seen before include "In this way" , "as indicated" , "an original Christmas gift" , "It follows" , "Therefore, hence" .)

I've seen this clue in the King Feature Syndicate, the Newsday, The Wall Street Journal, The New York Times, The Times, The Telegraph, The Guardian, The Washington Post, the Penny Press, The Sun, The Mirror, the Sydney Morning Herald, The Star Tribune, The Independent, the Evening Standard, the Newsday.com, the Universal, the LA Times and the USA Today.

'therefore' is the definition.
(I've seen this before)

This is the entire clue.

(Other definitions for ergo that I've seen before include "Thus" , "Consequently" , "'Cogito, ---- sum'" , "so philosopher wrote in Latin" , "It follows" .)

I've seen this clue in the King Feature Syndicate, the Newsday, The Wall Street Journal, The New York Times, The Times, The Telegraph, The Guardian, The Washington Post, the Penny Press, The Sun, The Mirror, the Sydney Morning Herald, The Star Tribune, The Independent, the Evening Standard, the Newsday.com, the Universal, the LA Times and the USA Today.

'therefore' is the definition.
('so' can mean 'consequently' or 'therefore')

This is the entire clue.

I've seen this clue in the King Feature Syndicate.

Therefore (5)